summaryrefslogtreecommitdiff
path: root/deps/npm/node_modules/define-properties/test/index.js
diff options
context:
space:
mode:
Diffstat (limited to 'deps/npm/node_modules/define-properties/test/index.js')
-rw-r--r--deps/npm/node_modules/define-properties/test/index.js125
1 files changed, 125 insertions, 0 deletions
diff --git a/deps/npm/node_modules/define-properties/test/index.js b/deps/npm/node_modules/define-properties/test/index.js
new file mode 100644
index 0000000000..3387f6bc7b
--- /dev/null
+++ b/deps/npm/node_modules/define-properties/test/index.js
@@ -0,0 +1,125 @@
+'use strict';
+
+var define = require('../');
+var test = require('tape');
+var keys = require('object-keys');
+
+var arePropertyDescriptorsSupported = function () {
+ var obj = { a: 1 };
+ try {
+ Object.defineProperty(obj, 'x', { value: obj });
+ return obj.x === obj;
+ } catch (e) { /* this is IE 8. */
+ return false;
+ }
+};
+var descriptorsSupported = !!Object.defineProperty && arePropertyDescriptorsSupported();
+
+var hasSymbols = typeof Symbol === 'function' && typeof Symbol('foo') === 'symbol';
+
+test('defineProperties', function (dt) {
+ dt.test('with descriptor support', { skip: !descriptorsSupported }, function (t) {
+ var getDescriptor = function (value) {
+ return {
+ configurable: true,
+ enumerable: false,
+ value: value,
+ writable: true
+ };
+ };
+
+ var obj = {
+ a: 1,
+ b: 2,
+ c: 3
+ };
+ t.deepEqual(keys(obj), ['a', 'b', 'c'], 'all literal-set keys start enumerable');
+ define(obj, {
+ b: 3,
+ c: 4,
+ d: 5
+ });
+ t.deepEqual(obj, {
+ a: 1,
+ b: 2,
+ c: 3
+ }, 'existing properties were not overridden');
+ t.deepEqual(Object.getOwnPropertyDescriptor(obj, 'd'), getDescriptor(5), 'new property "d" was added and is not enumerable');
+ t.deepEqual(['a', 'b', 'c'], keys(obj), 'new keys are not enumerable');
+
+ define(obj, {
+ a: 2,
+ b: 3,
+ c: 4
+ }, {
+ a: function () { return true; },
+ b: function () { return false; }
+ });
+ t.deepEqual(obj, {
+ b: 2,
+ c: 3
+ }, 'properties only overriden when predicate exists and returns true');
+ t.deepEqual(Object.getOwnPropertyDescriptor(obj, 'd'), getDescriptor(5), 'existing property "d" remained and is not enumerable');
+ t.deepEqual(Object.getOwnPropertyDescriptor(obj, 'a'), getDescriptor(2), 'existing property "a" was overridden and is not enumerable');
+ t.deepEqual(['b', 'c'], keys(obj), 'overridden keys are not enumerable');
+
+ t.end();
+ });
+
+ dt.test('without descriptor support', { skip: descriptorsSupported }, function (t) {
+ var obj = {
+ a: 1,
+ b: 2,
+ c: 3
+ };
+ define(obj, {
+ b: 3,
+ c: 4,
+ d: 5
+ });
+ t.deepEqual(obj, {
+ a: 1,
+ b: 2,
+ c: 3,
+ d: 5
+ }, 'existing properties were not overridden, new properties were added');
+
+ define(obj, {
+ a: 2,
+ b: 3,
+ c: 4
+ }, {
+ a: function () { return true; },
+ b: function () { return false; }
+ });
+ t.deepEqual(obj, {
+ a: 2,
+ b: 2,
+ c: 3,
+ d: 5
+ }, 'properties only overriden when predicate exists and returns true');
+
+ t.end();
+ });
+
+ dt.end();
+});
+
+test('symbols', { skip: !hasSymbols }, function (t) {
+ var sym = Symbol('foo');
+ var obj = {};
+ var aValue = {};
+ var bValue = {};
+ var properties = { a: aValue };
+ properties[sym] = bValue;
+
+ define(obj, properties);
+
+ t.deepEqual(Object.keys(obj), [], 'object has no enumerable keys');
+ t.deepEqual(Object.getOwnPropertyNames(obj), ['a'], 'object has non-enumerable "a" key');
+ t.deepEqual(Object.getOwnPropertySymbols(obj), [sym], 'object has non-enumerable symbol key');
+ t.equal(obj.a, aValue, 'string keyed value is defined');
+ t.equal(obj[sym], bValue, 'symbol keyed value is defined');
+
+ t.end();
+});